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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2014 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: FieldTypeParser.html 842 2015-03-07 18:20:42Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.jsimpledb.parse;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>import org.jsimpledb.core.FieldType;<a name="line.10"></a>
<span class="sourceLineNo">011</span><a name="line.11"></a>
<span class="sourceLineNo">012</span>/**<a name="line.12"></a>
<span class="sourceLineNo">013</span> * Parses a value having type supported by a {@link FieldType}.<a name="line.13"></a>
<span class="sourceLineNo">014</span> */<a name="line.14"></a>
<span class="sourceLineNo">015</span>public class FieldTypeParser&lt;T&gt; implements Parser&lt;T&gt; {<a name="line.15"></a>
<span class="sourceLineNo">016</span><a name="line.16"></a>
<span class="sourceLineNo">017</span>    private final FieldType&lt;?&gt; fieldType;<a name="line.17"></a>
<span class="sourceLineNo">018</span>    private final String typeName;<a name="line.18"></a>
<span class="sourceLineNo">019</span><a name="line.19"></a>
<span class="sourceLineNo">020</span>    /**<a name="line.20"></a>
<span class="sourceLineNo">021</span>     * Constructor.<a name="line.21"></a>
<span class="sourceLineNo">022</span>     *<a name="line.22"></a>
<span class="sourceLineNo">023</span>     * @param fieldType type to parse<a name="line.23"></a>
<span class="sourceLineNo">024</span>     */<a name="line.24"></a>
<span class="sourceLineNo">025</span>    public FieldTypeParser(FieldType&lt;?&gt; fieldType) {<a name="line.25"></a>
<span class="sourceLineNo">026</span>        this(fieldType, null);<a name="line.26"></a>
<span class="sourceLineNo">027</span>        if (fieldType == null)<a name="line.27"></a>
<span class="sourceLineNo">028</span>            throw new IllegalArgumentException("null fieldType");<a name="line.28"></a>
<span class="sourceLineNo">029</span>    }<a name="line.29"></a>
<span class="sourceLineNo">030</span><a name="line.30"></a>
<span class="sourceLineNo">031</span>    private FieldTypeParser(FieldType&lt;?&gt; fieldType, String typeName) {<a name="line.31"></a>
<span class="sourceLineNo">032</span>        if (fieldType == null)<a name="line.32"></a>
<span class="sourceLineNo">033</span>            throw new IllegalArgumentException("null fieldType");<a name="line.33"></a>
<span class="sourceLineNo">034</span>        this.fieldType = fieldType;<a name="line.34"></a>
<span class="sourceLineNo">035</span>        this.typeName = typeName;<a name="line.35"></a>
<span class="sourceLineNo">036</span>    }<a name="line.36"></a>
<span class="sourceLineNo">037</span><a name="line.37"></a>
<span class="sourceLineNo">038</span>    @Override<a name="line.38"></a>
<span class="sourceLineNo">039</span>    @SuppressWarnings("unchecked")<a name="line.39"></a>
<span class="sourceLineNo">040</span>    public T parse(ParseSession session, ParseContext ctx, boolean complete) {<a name="line.40"></a>
<span class="sourceLineNo">041</span><a name="line.41"></a>
<span class="sourceLineNo">042</span>        // Get FieldType<a name="line.42"></a>
<span class="sourceLineNo">043</span>        final FieldType&lt;?&gt; actualFieldType = this.fieldType != null ?<a name="line.43"></a>
<span class="sourceLineNo">044</span>          this.fieldType : session.getDatabase().getFieldTypeRegistry().getFieldType(this.typeName);<a name="line.44"></a>
<span class="sourceLineNo">045</span>        if (actualFieldType == null)<a name="line.45"></a>
<span class="sourceLineNo">046</span>            throw new ParseException(ctx, "no known field type `" + this.typeName + "' registered with database");<a name="line.46"></a>
<span class="sourceLineNo">047</span>        final int start = ctx.getIndex();<a name="line.47"></a>
<span class="sourceLineNo">048</span>        try {<a name="line.48"></a>
<span class="sourceLineNo">049</span>            return (T)actualFieldType.fromParseableString(ctx);<a name="line.49"></a>
<span class="sourceLineNo">050</span>        } catch (IllegalArgumentException e) {<a name="line.50"></a>
<span class="sourceLineNo">051</span>            throw new ParseException(ctx, "invalid " + actualFieldType.getName() + " parameter");<a name="line.51"></a>
<span class="sourceLineNo">052</span>        }<a name="line.52"></a>
<span class="sourceLineNo">053</span>    }<a name="line.53"></a>
<span class="sourceLineNo">054</span><a name="line.54"></a>
<span class="sourceLineNo">055</span>    /**<a name="line.55"></a>
<span class="sourceLineNo">056</span>     * Create an instance based on type name.<a name="line.56"></a>
<span class="sourceLineNo">057</span>     * Resolution of {@code typeName} is deferred until parse time when the database is available.<a name="line.57"></a>
<span class="sourceLineNo">058</span>     *<a name="line.58"></a>
<span class="sourceLineNo">059</span>     * @param typeName the name of a {@link FieldType}<a name="line.59"></a>
<span class="sourceLineNo">060</span>     * @return parser for the named type<a name="line.60"></a>
<span class="sourceLineNo">061</span>     */<a name="line.61"></a>
<span class="sourceLineNo">062</span>    public static FieldTypeParser&lt;?&gt; getFieldTypeParser(String typeName) {<a name="line.62"></a>
<span class="sourceLineNo">063</span>        if (typeName == null)<a name="line.63"></a>
<span class="sourceLineNo">064</span>            throw new IllegalArgumentException("null typeName");<a name="line.64"></a>
<span class="sourceLineNo">065</span>        return new FieldTypeParser&lt;Object&gt;(null, typeName);<a name="line.65"></a>
<span class="sourceLineNo">066</span>    }<a name="line.66"></a>
<span class="sourceLineNo">067</span>}<a name="line.67"></a>
<span class="sourceLineNo">068</span><a name="line.68"></a>




























































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